Class ParserAnnotator

This class will add parse information to an Annotation.
It assumes that the Annotation already contains the tokenized words
as a List<CoreLabel> in the TokensAnnotation under each
particular CoreMap in the SentencesAnnotation.
If the words have POS tags, they will be used.
Parse trees are added to each sentence's CoreMap (get with
CoreAnnotations.SentencesAnnotation) under
CoreAnnotations.TreeAnnotation).